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特发性炎性肌病间质性肺炎患者并发肺部感染病原菌及危险因素

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中华医院感染学杂志 2024年第8期34卷 1150-1153页

作者：周小果党强李海剑门翔路尧南阳市中心医院呼吸与危重症医学科河南南阳473005 南阳市中心医院风湿免疫科河南南阳473005

目的探究特发性炎性肌病(IIM)间质性肺炎(IP)患者肺部感染的病原学特征及危险因素。方法将2019年12月-2023年4月南阳市中心医院收治的95例IIMIP患者发生与未发生肺部感染的临床资料分别纳入感染组(n=52)和非感染组(n=43)。统计IIMIP患... 详细信息

目的探究特发性炎性肌病(IIM)间质性肺炎(IP)患者肺部感染的病原学特征及危险因素。方法将2019年12月-2023年4月南阳市中心医院收治的95例IIMIP患者发生与未发生肺部感染的临床资料分别纳入感染组(n=52)和非感染组(n=43)。统计IIMIP患者肺部感染的现况及病原学特征,通过单因素及多因素分析法分析IIMIP患者肺部感染的危险因素。结果95例IIMIP患者有52例发生肺部感染,肺部感染发生率为54.74%;共分离59株病原菌,其中革兰阴性菌、革兰阳性菌、真菌、巨细胞病毒和肺炎支原体占比分别为45.76%、28.81%、20.34%、3.39%、1.69%,革兰阴性菌以铜绿假单胞菌(11株)为主,革兰阳性菌以肺炎链球菌(7株)为主;多因素Logistic回归分析结果显示,外周血淋巴细胞计数、CD_(4)^(+)/CD_(8)^(+)及血清白蛋白、乳酸脱氢酶(LDH)是IIMIP患者肺部感染的危险因素(P<0.05)。结论IIMIP患者肺部感染的发生率高,且病原菌以革兰阴性菌为主;IIMIP患者肺部感染与外周血淋巴细胞计数、CD_(4)^(+)/CD_(8)^(+)、白蛋白、LDH关系密切;临床可据此予以早期针对性防治从而降低IIMIP患者肺部感染的发生风险。

关键词：特发性炎性肌病间质性肺炎肺部感染病原菌危险因素预防措施

Synthesis of Organofluorine Compounds with Acylsilanes

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Chinese Journal of Chemistry 2024年第8期42卷 887-902页

作者： Youyuan guo Gang zhou xiao Shen The Institute for Advanced Studies Engineering Research Center of Organosilicon Compounds&MaterialsMinistry of EducationWuhan University299 Bayi RoadWuhanHubei430072 China

Comprehensive Summary,Organofluorine compounds are central in synthetic chemistry,medicinal chemistry and material *** this review,we summarize the investigations on the synthesis of organofluorine compounds with *** the non-fluorinated acylsilanes,the in situ generation of difluoroenoxysilanes from the reactions of the acylsilanes with trifluoromethylation reagents is the major pathway,leading to the facile preparation of variousα,α-*** the fluoroalkylacylsilanes,apart from the in situ generation of difluoroenoxysilanes through anion Brook rearrangement,radical Brook rearrangement of the photoexcited acylsilanes and the selective control of reactivities of the biradicals pave the way for the synthesis of a variety of organofluorine *** general,most of these reactions gave racemic products,and the asymmetric synthesis of organofluorine compounds with acylsilanes is still rare,which would be a future.

关键词： Acylsilanes Organofluorine compounds Brook rearrangement Radical rearrangement β-Fluoride elimination Asymmetric catalysis Photocatalysis Defluoroalkylation

Keggin type heteropolyacids-catalyzed synthesis of quinoxaline derivatives in water

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Chinese Chemical Letters 2009年第2期20卷 161-164页

作者： Tai Kun Huang Lin Shi Rui Wang Xing zhou guo xiao Xia Lu Chengdu Institute of Biology Chinese Academy of Sciences Chengdu 610041 PR China

Keggin type heteropolyacids was found to be an efficient and reusable catalyst for the synthesis of biologically active quinoxaline derivatives from the condensation of 1,2-diamine with 1,2-dicarbonyl compounds in excellent yields in water. This method provides a new and efficient protocol in terms of small quantity of catalyst, a wide scope of substrates, and simple work-up procedure.

关键词： Keggin type heteropolyacids 1,2-Diamines 1,2-Diketones Quinoxaline derivatives Water

The E3 ubiquitin ligase TRAF6 controls CTLA-4 turnover and promotes T-cell-mediated antitumor immunity

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Cellular & Molecular Immunology 2024年第1期21卷 97-99页

作者： xiao-Liang Jie Hua guo Guang-Biao zhou State Key Laboratory of Molecular Oncology National Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical College100021 BejingChina

Yu et al.[1]reported that the tumor necrosis factor(TNF)receptor OX40(CD134)-TNF receptor-associated factor 6(TRAF6)axis mediates Lys63-linked ubiquitination and subsequent lysosomal degradation of cytotoxic T-lymphocyte antigen 4(CTLA-4),leading to the enhancement of CD8^(+)T-cell-mediated antitumor *** findings unveil a previously unknown mechanism in controlling the stability of the immune checkpoint CTLA-4 and provide a potential therapeutic target for the improvement of Tcell-based immunotherapy.

关键词： immunity OX40 ubiquitin

Role of alloying and heat treatment on microstructure and mechanical properties of cast Al-Li alloys:A review

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China Foundry 2024年第5期21卷 445-460页

作者： guo-hua Wu You-jie guo Fang-zhou Qi Shen Zhang Yi-xiao Wang Xin Tong Liang Zhang School of Materials Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China

Due to the prominent advantages of low density,high elastic modulus,high specific strength and specific stiffness,cast Al-Li alloys are suitable metallic materials for manufacturing complex large-sized components and are ideal structural materials for aerospace,defense and military *** the basis of the microstructural characteristics of cast Al-Li alloys,exploring the role of alloying and micro-alloying can stabilize their dominant position and further expand their application *** this review,the development progress of cast Al-Li alloys was summarized *** to the latest research highlights,the influence of alloying and heat treatment on the microstructure and mechanical properties was systematically *** potential methods to improve the alloy performance were *** response to the practical engineering requirements of cast Al-Li alloys,the scientific challenges and future research directions were discussed and prospected.

关键词： cast Al-Li alloy alloying microstructure mechanical properties heat treatment

Cracking on a nickel-based superalloy fabricated by direct energy deposition

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China Foundry 2024年第4期21卷 311-318页

作者： Xue Zhang Ya-hang Mu Liang Ma Jing-jing Liang Yi-zhou zhou xiao-feng Sun Jin-guo Li School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering Northeastern UniversityShenyang 110819China

Cracks have consistently been a significant challenge limiting the development of additive manufactured nickel-based *** is essential to investigate the location of cracks and their forming *** study extensively examines the impact of solidification process,microstructural evolution,and stress concentration on crack initiation during direct energy deposition(DED).The results emphasize that the crack formation is significantly related to large-angle grain boundaries,rapid cooling *** caused by large-angle grain boundaries and a fast-cooling rate predominantly appear near the edge of the deposited *** cracks are more likely to form near the top of the deposited sample,due to the presence ofγ/γ'*** secondary dendritic arm and the carbides in the interdendritic regions can obstruct liquid flow during the final stage of solidification,which results in the formation of solidification cracks and *** work paves the way to avoid cracks in nickel-based superalloys fabricated by DED,thereby enhancing the performance of superalloys.

关键词： location cracks direct energy deposition nickel-based superalloys

Signature Inversion in Odd-odd Nuclei

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原子核物理评论 2009年第S1期26卷 158-164页

作者： LIU Min-liang,ZHANG Yu-hu,zhou xiao-hong,guo Ying-xiang,LEI Xiang-guo,guo Wen-tao(Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China) Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China

Signature inversion in odd-odd nuclei is investigated by using a proton and a neutron coupling to the coherent state of the core. Two parameters are employed in the Hamiltonian to set the energy scales of rotation,neutron-proton coupling and their competition. Typical level staggering is extracted from the calculated level energies. The calculation can approximately reproduce experimental signature inversion. Signature inversion is attributed to the rotational motion and neutron-proton residual interaction having reversed signature splitting rules. It is found signature inversion can appear at axially symmetric shape and high-K band.

关键词： signature odd-odd nuclei neutron-proton interaction

Insights into plant salt stress signaling and tolerance

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Journal of Genetics and Genomics 2024年第1期51卷 16-34页

作者： Huapeng zhou Haifan Shi Yongqing Yang Xixian Feng Xi Chen Fei xiao Honghui Lin Yan guo Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education College of Life SciencesSichuan UniversityChengduSichuan 610064China State Key Laboratory of Plant Environmental Resilience China Agricultural UniversityBeijing 100193China College of Grassland Science Nanjing Agricultural UniversityNanjingJiangsu 210095China Xinjiang Key Laboratory of Biological Resources and Genetic Engineering College of Life Science and TechnologyXinjiang UniversityUrumqiXinjiang 830046China

Soil salinization is an essential environmental stressor,threatening agricultural yield and ecological security *** soils accumulate excessive soluble salts which are detrimental to most plants by limiting plant growth and *** is of great necessity for plants to efficiently deal with the adverse effects caused by salt stress for survival and successful *** determinants of salt tolerance have been identified in plants,and the cellular and physiological mechanisms of plant salt response and adaption have been intensely *** respond to salt stress signals and rapidly initiate signaling pathways to re-establish cellular homeostasis with adjusted growth and cellular *** review summarizes the advances in salt stress perception,signaling,and response in plants.A better under-standing of plant salt resistance will contribute to improving crop performance under saline conditions using multiple engineering *** rhizosphere microbiome-mediated plant salt tolerance as well as chemical priming for enhanced plant salt resistance are also discussed in this review.

关键词： Salt stress Salt perception Salt response and signaling Plant salt tolerance Chemical priming Rhizosphere microbiome

Basaloid squamous carcinoma of esophagus:a clinicopathological,immunohistochemical and electron microscopic study of sixteen cases

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World Journal of Gastroenterology 1998年第5期4卷 34-40页

作者： ZHANG Xin Hua, SUN Gui Qin, zhou xiao Jun, guo Hui Fang and ZHANG Tai He

AIM To further clarify the clinicopathological, immunohistochemical and electron microscopic features, and prognostic aspect of basaloid squamous carcinoma (BSC), a rare esophageal *** We reviewed 763 documented cases of esophageal malignancies from year (1977-1996) from our hospital, and discovered 16 (2.1%) cases of BSC. The clinicopathological features of these cases were evaluated. Immunohistochemistry (S-P method), histochemical stains, and electron microscopy were used to further characterize the *** The tumors were classified into stages Ⅰ (n=1), ⅡA (n=6), ⅡB (n=2), Ⅲ (n=5), and Ⅳ (n=2) according to the criteria of the UICC TNM classification system of malignant tumors (1987). Most neoplasms were located in the mid third of the esophagus. Grossly, they had a similar appearance of conventional esophageal carcinoma, but showed a typical cytoarchitectural pattern of BSC histologically. The most important histologic feature of this tumor is carcinoma with a basaloid pattern, intimately associated with squamous cell carcinoma, dysplasia, or focal squamous differentiation. The basaloid cells were round to oval in shape with scant cytoplasm, arranged mainly in the form of solid, smooth-contoured lobules with peripheral palisading. A panel of immunostains were used for the basaloid component of the tumor with the following results: CK(Pan) 14/16 (+); EMA 16/16 (+); Vimentin 4/16 (+); S-100 protein 7/16 (+). CEA and smooth muscle actin were negative. Electron microscopy (EM) revealed that the basaloid cells were poorly differentiated, with a few desmosomes and fibrils, and numerous free and polyribosome. Of the 11 patients with adequate follow-up 8 died within 2 years, with an average survival time of 16.2 months. No stage Ⅱ, Ⅲ or Ⅳ cases survived beyond 5 years. The one-year survival rate was 60% and two-year 20%.CONCLUSION The BSC of esophagus is a distinct clinicopathological entity with poor prognosis. The cellular differentiation and bi

关键词： esophageal neoplasms/pathology esophageal neoplasms/ultrastructure carcinoma, squamous cell/pathology carcinoma, squamous cell/ultrastructure